Excuse me, when is it cold on March 9?

"Sanjiu" refers to the third "nine days" from winter to the future, that is, the 19 to the 27th day from winter to the future.

There is a saying in China that "count nine winters". From the solstice of winter, "Nine" is used to calculate the seasons. The specific calculation method is to count from the winter solstice (around February 22 of the Gregorian calendar today) (the winter solstice is called "September 9", which means that the cold weather starts to count for nine days), and every nine days are called "September 9", the first nine days are called "September 19" and the last nine days are called "February 29".

And so on, until "99", when the number reaches 998 1 day (about 12 day in March of Gregorian calendar), it is "out of nine" (when the number of nine ends, it will be cold). At this time, winter has passed and spring has arrived.

Extended data:

Afraid of cold: it is best to eat ginger to drive away the cold.

The most common food is also the best medicine, and often the cheaper the food, the better the curative effect.

Tip: Drink ginger tea and Jiang Shui to soak your feet. As the saying goes: "There is ginger in winter, and it is not afraid of wind and frost." It is just right to eat ginger in winter. Because ginger is spicy, it can produce hot air in the body and dispel the cold in winter, so patients who are frozen can often drink ginger soup to dispel the cold and prevent common diseases such as colds.

Pay attention to eating ginger. First, peel ginger in winter. Second, don't eat ginger at night. Ginger is peeled when it is hot, and it must be peeled in winter to drive away the cold.

Baidu encyclopedia-Sanjiu

The coldest time has come! This should be finished in three or nine days.